Water-absorbing Layer in OLED Packaging Structure
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Solution Overview
Problem
The existing OLED and QLED display components are susceptible to deterioration due to water and oxygen exposure, which affects display quality.
Innovation Solution
A packaging structure that includes a substrate, a light-emitting unit, a packaging layer with an inorganic film and an encapsulant layer, and a water-absorbing layer completely wrapped by the packaging layer, which absorbs and prevents water and oxygen from reaching the light-emitting unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a packaging layer is added to protect the light-emitting unit from water and oxygen, then the reliability of the display component is improved, but the device complexity increases
Solution Approach 1:
The water-absorbing layer is completely wrapped by the packaging layer, creating a nested structure where the inner layer is protected by the outer layer. This nested configuration allows the water-absorbing layer to be fully enclosed within the packaging structure, maximizing protection while maintaining a compact design.
Solution Approach 2:
The packaging structure combines multiple materials with different functions: the packaging layer provides barrier protection against water and oxygen, while the water-absorbing layer provides active moisture absorption. This composite structure integrates materials with complementary properties to achieve superior protection.
2Duration of action of stationary object
If the water-absorbing layer is completely wrapped by the packaging layer, then the functionality of the water-absorbing layer is extended, but the manufacturing precision requirements increase
Solution Approach 1:
The water-absorbing layer is placed and secured within the packaging structure before the packaging layer is fully sealed. This preliminary positioning ensures that the water-absorbing layer is correctly located and will remain completely wrapped during subsequent manufacturing steps, reducing alignment precision requirements.
Solution Approach 2:
The packaging layer is designed as a flexible encapsulant that can conform to the water-absorbing layer and seal around it. This flexible film approach allows for easier integration and sealing compared to rigid structures, reducing the precision needed for alignment during manufacturing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively protects the light-emitting unit from moisture and oxygen, maintaining display quality and extending the functionality of the water-absorbing layer by preventing external exposure.
Implementation Method 1
a water-absorbing layer which is arranged in the packaging layer and completely wrapped by the packaging layer
Data Source
AI summary
A packaging structure, a display component and a display device are provided by the present disclosure. The packaging structure includes: a substrate; a light-emitting unit arranged on the substrate; a packaging layer, by which the light-emitting unit is packaged on the substrate; and a water-absorbing layer which is arranged in the packaging layer and completely wrapped by the packaging layer.